Copper-Catalyzed Domino Three-Component Approach for the Assembly of 2-Aminated Benzimidazoles and Quinazolines
作者:Lam Quang Tran、Jihui Li、Luc Neuville
DOI:10.1021/acs.joc.5b00614
日期:2015.6.19
A copper-promoted three-component synthesis of 2-aminobenzimidazoles (1) or of 2-aminoquinazolines (2) involving cyanamides, arylboronic acids, and amines has been developed. The operationally simple oxidative process, performed in the presence of K2CO3, a catalytic amount of CuCl2·2H2O, 2,2′-bipyridine, and an O2 atmosphere (1 atm), allows the rapid assembly of either benzimidazoles or quinazolines
已经开发了一种铜促进的三组分合成2-氨基苯并咪唑(1)或2-氨基喹唑啉(2)的方法,该方法涉及氰胺,芳基硼酸和胺。在K 2 CO 3,催化量的CuCl 2 ·2H 2 O,2,2'-联吡啶和O 2气氛(1个大气压)的存在下进行的操作简单的氧化过程可以使任何一种的快速组装分别从芳基或苄基取代的氰胺开始的苯并咪唑或喹唑啉。在这个过程中,铜促进了三个键,两个C–N键以及一个由CH–H功能化事件产生的额外键的形成。